(X+5)+(X-2)=67 求X
问题描述:
(X+5)+(X-2)=67 求X
答
(X+5)+(X-2)=67
X+5+X-2=67
2X+3=67
2X=64
X=32
答
(X+5)+(X-2)=67
2x+3=67
2x=67-3
2x=64
x=32